JPH0849736A - Split caliper for disc brake - Google Patents

Abstract

PURPOSE:To reduce the number of part items in casting so as to reduce the weight of a device by forming an outer frame of a metal plate. CONSTITUTION:When a brake pedal is operated, an inner frame 14 moves to the opposite side to the disc rotor 12 side while being guided by a slide pin, and the lining 30 of an opposed outer pad 16 is pressed to the other side face of the disc rotor 12 to start braking action. The outer pad 16 is formed by jointing a back plate 34 and the lining 30 to each other. The back plate 34 is formed by the press working of a metal plate, and both width direction sides are bent at a right angle in order to prevent bending deformation and fitted to the bridge parts 14B of the inner frame 14 by two connecting bolts 38. Since the outer pad 16 is a press-formed product that can obtain the plane, the number of machined faces can be reduced, and the weight of a device can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split type caliper for a disc brake mounted on a vehicle such as a four-wheeled vehicle or a two-wheeled vehicle, and more particularly to a split type caliper with a reduced number of parts and a reduced weight. Regarding calipers.

[0002]

2. Description of the Related Art There is a caliper called a pin slide type caliper for disc brakes. This pin slide type caliper has a frame type (for example,
Japanese Utility Model Publication No. 5-27367, JP-A-62-11812.
No. 8, etc.) and a fist type.

The frame type caliper has high rigidity,
There is an advantage that it is easy to put in and take out the brake pad. This frame-type caliper is a split type caliper that is generally divided into an inner frame (a side provided with a cylinder portion) and an outer frame. The reason why the frame-type caliper is divided is that the frame-type caliper has a frame-like shape, which makes it difficult to process the cylinder portion unless the frame-type caliper is divided.

As shown in FIGS. 12 (A) and 12 (B), a frame type split caliper 10 of a disc brake.
0 is a bridge portion 1 that straddles the outside of the disc rotor 102.
From 04, an inner frame 100A and an outer frame 100B are divided into two parts on both sides of the disc rotor 102, and the inner frame 100A and the outer frame 100B are inserted into the joint surface of the bridge portion 104 in the axial direction of the disc rotor 102. Are connected by a plurality of connecting bolts 106.

[0005]

By the way, the frame type split caliper 100 is cast and has many casting parts due to splitting, which is disadvantageous in terms of weight. Therefore, many man-hours and assembling man-hours are required.

In view of the above facts, the present invention has an object to provide a split type caliper of a disc brake which can reduce the number of parts and the weight, thereby reducing the processing man-hours and the assembly man-hours. is there.

[0007]

A split caliper for a disc brake according to a first aspect of the present invention comprises a base portion which is floatingly supported by a vehicle body, and a pair of bridge portions which are integrally provided on the base portion and straddle the disc rotor. An inner frame having an outer frame, a friction member pressed by the disc rotor, and a metal plate supporting the friction member, and an outer frame attached to the one end of the bridge portion by a connecting means. It is characterized by that.

The invention described in claim 2 is the same as claim 1.
In the split type caliper of the disc brake described in
It is characterized in that a squeal preventing means is provided which has an insertion portion through which the connecting means is inserted and which is attached to the outer frame by fastening the connecting means to prevent brake squeal.

[0009]

According to the split type caliper of the disc brake of the first aspect, the base of the inner frame is floatingly supported by the vehicle body. The outer frame is attached by the connecting means so as to be connected to one ends of a pair of bridge portions that straddle the disk rotor integrally provided on the base portion. As a result, the tips of the bridge portions are connected to each other by the outer frame, and the frame-shaped split caliper is completed.

In this outer frame, since the portion supporting strength is made of a metal plate, the weight is lighter than that of a cast outer frame having the same strength.

In the split type caliper of the disc brake according to the second aspect, the squeal preventing means is attached to the outer frame by inserting the connecting means into the insertion portion of the squeal preventing means and fastening the connecting means. Brake squeal (vibration) of the outer frame that occurs when the friction material is pressed against the disc rotor by the brake operation is damped by the squeal preventing means.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a disc brake 10 is provided.
Is a rotating disk rotor 12 and inner frame 1
4 and an outer pad 16 serving as an outer frame, and a inner pad 20.

The inner frame 14 is supported on one side of the disc rotor 12 by a pair of sliding pins (both not shown) in a cantilever manner on a caliper mounting fixedly mounted on a vehicle body (not shown). And slides along the sliding pin.

The inner frame 14 has a base portion 14A supported by a sliding pin, and a pair of bridge portions 14 provided integrally on both sides of the base portion 14A and straddling the disk rotor 12.
It is a cast product made of iron or the like and having a substantially U-shape with B.

A cylinder hole 22 is formed in the center of the base portion 14A on the disk rotor 12 side, and the cylinder hole 22 is formed.
Cup-shaped piston 24 to be inserted in the cylinder hole 2
2 is provided with a liquid chamber 26 defined at the bottom of the second chamber, an inlet port (not shown) for introducing the pressurized hydraulic fluid into the liquid chamber 26, a blinder screw for discharging the air in the hydraulic fluid, and the like. There is.

The tips of the pair of bridge portions 14B are machined, and a screw hole 28 is machined in the center.

The inlet port (not shown) of the inner frame 14 is connected to a known hydraulic master cylinder (not shown) through a brake hose so that the pressure liquid generated in the hydraulic master cylinder by the brake operation is introduced into the liquid chamber 26. It has become. When the pressurized liquid is introduced into the liquid chamber 26, the piston 24 moves the cylinder hole 22 into the disc rotor 1.
Move forward to side 2.

As is well known, the inner pad 20 is constructed by joining a lining 30 and a back metal 32 made of a steel plate or the like.

On the other hand, the outer pad 16 is constructed by joining the back metal 34 and the lining 30. The back metal 34 of the outer pad 16 is a metal plate (eg, steel plate).
It is a pressed product, and both sides in the width direction are bent at right angles to prevent bending deformation.

In addition, bolt insertion holes 36 are formed in the vicinity of both longitudinal ends of the back metal 34 at positions corresponding to the screw holes 28 formed in the inner frame 14.

Next, a procedure for assembling the caliper 18 will be briefly described. First, the inner frame 14 is supported in a cantilever manner by a caliper mounting that is fixedly mounted on a vehicle body (not shown) via a pair of sliding pins (both not shown). The piston 24 is previously inserted into the cylinder hole 22 of the inner frame 14.

Next, the outer pad 16 is attached to the bridge portion 14B of the inner frame 14 with two connecting bolts 38 (connecting means).

Next, the inner pad 20 is inserted and attached at a predetermined position between the base portion 14A and the disc rotor 12 together with a locking spring (not shown).

After the assembly is completed, the brewer screw is loosened and the air in the working fluid is discharged.

In the disc brake 10 assembled in this way, when a brake pedal (not shown) is operated and pressurized liquid is introduced into the liquid chamber 26, the piston 24 advances through the cylinder hole 22 toward the disc rotor 12 side. The inner pad 20 is pressed against one side surface of the disc rotor 12. By this reaction, the inner frame 14 is guided by a sliding pin (not shown), and the disc rotor 12
The lining 30 of the outer pad 16 that faces the other side is pressed against the other side surface of the disk rotor 12, and a braking action is performed.

Next, Table 1 below shows a comparison between the caliper 18 of this embodiment and the conventional caliper.

[0028]

[Table 1]

Explaining Table 1 in detail, the reason why the number of machined surfaces connecting the outer pad and the inner frame can be made smaller than in the conventional case is that the outer pad 16 can have a flat surface in this embodiment. This is because it is a press-formed product such as a steel plate (in the outer pad 16, there is no need to process the portion where the tip portion of the bridge portion 14B abuts).

The reason why the connecting bolt 38 can be shortened is that in the conventional example, as shown in FIG. 2, the bolt inserting hole 108 for inserting the connecting bolt 106 is a casting (inner frame 100).
Since it was formed in A), it was not possible to reduce the thickness of the casting near the hole due to a problem in strength. On the other hand, in the present embodiment, as shown in FIG. 1, since the bolt insertion hole 36 through which the connecting bolt 38 is inserted is formed of a steel plate which is stronger than the casting, the length of the bolt insertion hole 36 is As a matter of course, the length of the connecting bolt 36 can be shortened.

The reason why the weight can be reduced is that it is possible to reduce the weight by using a steel plate to obtain the same strength as compared with using a casting. That is, conventionally, the metal plate used on the outer side has a role of supporting the lining 30, and the outer frame of the cast has a role of a strength member. However, in the present embodiment, the outer pad 16 is used. This is because it serves both as a strength member and as a support for the lining 30 (that is, because there is no casting for connecting the tips of the bridge portions 14B to each other). Further, the fact that the connecting bolt 38 is short can be raised as one of the reasons.

As described above, in this embodiment, the number of parts, the number of working steps, and the size of the connecting bolt can be reduced, so that the manufacturing cost can be reduced. Also,
Since the weight can be reduced, the unsprung load of the vehicle can be reduced, and the fuel consumption can be improved.

[Second Embodiment] A second embodiment of the present invention is shown in FIG.
And FIG. 4 will be described. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 3, a boss 40 is formed in the inner frame 14 of this embodiment in the vicinity of the cylinder hole 22. The outer pad 16 is attached to the boss 40.
A bolt receiving hole 42 is formed on the side opposite to.

On the other hand, in the outer pad 16 of the present embodiment, a notch 44 is formed in the central portion on one side in the width direction, and a screw hole 44 is formed at a position facing the bolt receiving hole 42.

Further, the inner pad 20 has a protruding portion 20A formed at the center of one edge thereof, and a bolt insertion hole 46 is formed in the protruding portion 20A.

As shown in FIGS. 3 and 4, in the present embodiment, the non-threaded portion 48A of the support bolt 48 is inserted into the bolt insertion hole 46 of the inner pad 20 and is formed in the vicinity of the head 48C of the support bolt 48. The screwed portion 48B is screwed into the screw hole 44 of the outer pad 16.

When the braking operation is performed, the outer pad 1
6 is an outer pad 1 with the bridge portion 14B as a fulcrum.
The shaft side (direction of arrow A) of the disk rotor 12 of 6 receives a force in the direction of opening outward (direction of arrow B). For this reason,
The opposite side of the outer pad 16 (the direction opposite to the arrow A direction) receives a force inward (direction of the arrow C), but in the present embodiment, the support bolt 48 receives this force. It is possible to prevent the outer pad 16 from opening when the brake is operated.

The other operational effects are similar to those of the first embodiment. [Third Embodiment] A third embodiment of the present invention will be described with reference to FIGS.

The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 5A and 5B, the shim 50 is attached to the outer surface of the outer pad 16 in this embodiment.

The shim 50 is formed by sticking (or coating) an elastomer (for example, rubber or the like) on one or both sides of a metal plate.

A bolt insertion hole 52 as an insertion portion is formed in the shim 50 at a position corresponding to the bolt insertion hole 36 of the outer pad 16.

The connecting bolt 54 of this embodiment includes a head portion 54.
In the vicinity of A, a non-screw portion 54C having a predetermined length and a diameter larger than that of the screw portion 54B is provided.

In this embodiment, the outer pad 16 and the shim 50 are stacked on the bridge portion 14B in this order and the connecting bolt 54 is
It is attached in.

By tightening the connecting bolts 54, the back metal 34 of the outer pad 16 is reliably sandwiched between the non-screwed portion 54C and the bridge portion 14B. On the other hand, the shim 50 is sandwiched between the back metal 34 of the outer pad 16 and the head portion 54A of the connecting bolt 54 at both ends, but since it has the non-screw portion 54C, the shim 50 is not sandwiched more than necessary.

When a braking operation is performed and the lining 30 slides on the side surface of the rotor 12 (not shown in FIG. 5), so-called brake squeal (vibration) may occur.
In this embodiment, since the shim 50 provided with the elastomer is attached, it is possible to damp the vibration of the outer pad 16 and prevent the brake squeal (vibration) during braking.

If the connecting bolt 54 does not have the non-threaded portion 54C, the backing 3 is tightened by tightening the connecting bolt 54.
The elastomer provided in No. 4 may be crushed and the intended damping action may be reduced. In this embodiment, this can be prevented.

Since the connecting bolt 54 is inserted into the bolt insertion hole 36 of the shim 50, the shim 5 is vibrated by vibration.
There is no chance that 0 will drop out.

The shim 5 through which the connecting bolt 54 is inserted
Although the bolt insertion hole 36 is provided at 0, a U-shaped notch may be formed at both ends of the shim 50 instead of the bolt insertion hole 36. [Fourth Embodiment] A fourth embodiment of the present invention will be described with reference to FIGS. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 6A and 6B, in this embodiment, the outer pad 16 and the inner frame 14 are provided.
A shim 60 having substantially the same size as the tip of the bridge portion 14B is sandwiched between the bridge portion 14B and the bridge portion 14B.

A bolt insertion hole 62 as an insertion portion is formed in the shim 60, and the non-threaded portion 6 of the connecting bolt 64 is formed.
4C is inserted through the bolt insertion hole 62. The connecting bolt 64 of the present embodiment has the same structure as the connecting bolt 54 of the third embodiment as shown in the figure, but the non-screw portion 64C.
Is getting longer.

By tightening the connecting bolt 64, the non-threaded portion 64C contacts the bridge portion 14B, so that the shim 60 is not pinched more than necessary.

In this embodiment, the vibration of the outer pad 16 can be prevented from being transmitted to the inner frame 14 by the shim 60. Of course, the shim 50 described in the third embodiment may be attached to the outer side of the outer pad 16. [Fifth Embodiment] A fifth embodiment of the present invention will be described with reference to FIG. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

The bridge portion 14B of the inner frame 14 of this embodiment has a machined surface 70 on the outside near the tip. The bridge portion 14B has a screw hole 72 formed at a right angle to the machined surface 70.

Further, at both ends in the longitudinal direction of the outer pad 16 of this embodiment, mounting portions 16A are respectively bent at right angles so as to face the machined surface 70 of the bridge portion 14B.
Is provided, and the bolt insertion hole 7 is provided in the mounting portion 16A.
4 are formed.

In this embodiment, the shim 60 is sandwiched between the mounting portion 16A and the machined surface 70.

The non-threaded portion 64C of the connecting bolt 64 is inserted into the bolt insertion hole 62 of the shim 60 and the bolt insertion hole 74 of the mounting portion 16A. This embodiment also uses the connecting bolt 64.
Since the non-screw portion 64C abuts on the bridge portion 14B by tightening, the shim 60 is not pinched more than necessary.

The function of the shim is the same as that of the fourth embodiment, but in this embodiment, in addition to this, the outer pad 16 and the bridge portion 14 are formed by the mounting portion 16A and the machined surface 70.
Since B is brought into contact with and fixedly connected, part of the braking torque generated in the outer pad 16 is transmitted from the surface of the mounting portion 16A to the surface of the machined surface 70 during braking. Therefore, since it is not necessary to transmit all the braking torque from the outer pad 16 to the bridge portion 14B by the connecting bolt 64 as in the first to fourth embodiments, the strength of the connecting bolt 64 is higher than that in the first embodiment. The size can be reduced and the weight can be reduced. The bridge unit 14
The braking torque transmitted to B is transmitted to the vehicle body via the inner frame 14. [Sixth Embodiment] A sixth embodiment of the present invention will be described with reference to FIG. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

The bridge portion 14B of the inner frame 14 of this embodiment has a machined surface 76 inside the vicinity of the tip. The bridge portion 14B has a bolt insertion hole 78 formed at a right angle to the machined surface 76.

A screw hole 80 is formed in the mounting portion 16A of the outer pad 16 of this embodiment.

Also in this embodiment, the shim 60 is sandwiched between the mounting portion 16A and the machined surface 70.

The bolt insertion hole 7 of the bridge portion 14B
8 and the bolt insertion hole 62 of the shim 60, the connecting bolt 6
4 non-screw part 64C is inserted. In this embodiment, by tightening the connecting bolt 64, the non-screwed portion 64C abuts the mounting portion 16A of the outer pad 16, so that the shim 60 is not pinched more than necessary. The operation is similar to that of the fifth embodiment.

The shims 50 and 60 described above may be either of the adhesive type or the non-adhesive type. In the conventional shim, it is sandwiched and fixed between the pad metal plate and the caliper claw portion, but there is a problem that it is crushed and it is difficult to keep the damping characteristic constant. However, in the third to sixth embodiments, since the shim does not collapse, both the rubber coating shim and the adhesive shim exhibit the effects of the coating agent and the adhesive itself (spring effect, damping effect). Easy to do.

In the third to sixth embodiments, the shim is used to damp the vibration of the outer pad 16, but as a countermeasure other than the shim, for example, FIGS.
It is also possible to take measures as shown in.

In the embodiment shown in FIG. 9, the outer pad 1
A mass 90 is attached to the back metal 34 of No. 6 to prevent vibration by the mass damper effect.

In the embodiment shown in FIG. 10, a mass 90 is attached to the back metal 34 of the outer pad 16 via a spring 92 to prevent vibration by the dynamic damper effect.

Further, in the embodiment shown in FIG. 11, the backing 34 of the outer pad 16 is covered with the cover 94, and the space between the backing 34 and the cover 94 has small particles (for example, metal balls,
A proper amount of sand, ceramic balls, etc.) 96 is put in, and vibration is prevented by the damper effect using friction.

[0069]

As described above, according to the split type caliper of the disc brake described in claim 1, since the outer frame is the metal plate, the casting is better than the conventional cast outer frame. It has an excellent effect that the number of parts and the weight can be reduced. Further, this can also reduce the number of processing steps and the number of assembly steps.

Further, in the split type caliper of the disc brake according to the second aspect, since the squeal preventing means is attached to the outer frame, there is an excellent effect that the brake squeal (vibration) of the outer frame can be attenuated. Also, brake squeal and vibration of the outer frame can be damped, so vibration transmission to the inner frame is damped,
Vibration to the vehicle body is prevented. Further, since the squeal preventing means is attached to the outer frame by inserting the connecting means into the inserting portion of the squeal preventing means, it is possible to prevent the squeal preventing means from dropping due to vibration.

[Brief description of drawings]

FIG. 1 is a perspective view of a disc brake using a split type caliper of the disc brake according to a first embodiment of the present invention.

FIG. 2 is a side view of a conventional disc brake.

FIG. 3 is a perspective view of a split type caliper of a disc brake according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a split caliper of the disc brake shown in FIG.

5A is a perspective view of a main part of a split type caliper of a disc brake according to a third embodiment of the present invention, and FIG. 5B is a sectional view of FIG. 5A.

6A is a perspective view of a main part of a split type caliper of a disc brake according to a fourth embodiment of the present invention, and FIG. 6B is a sectional view of FIG. 6A.

FIG. 7 is a perspective view of a main part of a split type caliper of a disc brake according to a fifth embodiment of the present invention.

FIG. 8 is a perspective view of an essential part of a split type caliper of a disc brake according to a sixth embodiment of the present invention.

FIG. 9 is a side view of an outer frame according to another embodiment of the present invention.

FIG. 10 is a side view of an outer frame according to still another embodiment of the present invention.

FIG. 11 is a side view of an outer frame according to still another embodiment of the present invention.

12A is a perspective view of a split caliper of a conventional disc brake, and FIG. 12B is an exploded perspective view of the split caliper of the disc brake shown in FIG. 12A.

[Explanation of symbols]

 10 Disc Brake 12 Disc Rotor 14 Inner Frame 14A Base 14B Bridge 16 Outer Pad (Outer Frame) 18 Split Caliper 30 Friction Material 34 Back Metal (Metal Plate) 38 Connecting Bolt (Connecting Means) 52 Bolt Inserting Hole (Inserting Part) 62 Bolt insertion hole (insertion part)

Claims (2)

[Claims] 1. An inner frame having a base part that is floatingly supported by a vehicle body and a pair of bridge parts that are integrally provided on the base part and that straddle the disk rotor, a friction material that is pressed by the disk rotor, and the friction. A split caliper for a disc brake, comprising: an outer frame, which is composed of a metal plate that supports a material, and is attached to the one end of the bridge portion by a connecting means. 2. The squeal preventing means, which has an insertion portion through which the connecting means is inserted, is attached to the outer frame by fastening the connecting means to prevent brake squeaking. Disc brake split caliper.